Recording multiple routes and the ability to view them on the GPS, or computer, would make it more useful. Recording each stop and the time stopped is also desirable. Is there such a device?

I purchased and installed a Double Din Car DVD Player GPS Navigation TV in my car and also purchased the SD card but I don’t know how to download or where I can buy the software to download maps to the card. Help!

I am looking to purchase a good GPS unit for my car. I would like a unit that will have audio directions, can allow to input multiple stops & can optimize a route with those stops.
Currenlty, Microsoft Streets & Trips works works well although using a laptop in the car is not exactly safe.
I have [...]

For example, can you legally fly a direct gps route from Guadeloupe to Opa Locka, FL? Or would you have to stick to airways?
What are all the current reasons why our General Aviation system still uses airways?